I don’t think I have it where I can actually “write” on my skin, but what do you think about this? When my heart is pounding hard all over, my veins are distended, my hands are bright red and my fingers are swollen (I get these symptoms just from typing too long – like right now! or from massaging my dog), if you touch my red fingers, they will turn white where you touch, but then it disappears back to red after a few seconds. Could this also be a histamine thing?